O. O'Brien's player profile at Derry City across UEFA Europa League 2026, UEFA Conference League 2026, and Premier Division 2026 covers the football details people usually need first: role, squad information, current numbers, recent matches, and upcoming fixtures. It gives a quick read on what O. O'Brien is contributing now, with match timing and detailed stats available when more context is needed.

O. O'Brien is listed as a defender for Derry City with squad number #33. The profile also shows 16 years old. Those details matter because role, squad status, experience, and physical profile can all influence minutes, match involvement, and the kind of output to expect.

O. O'Brien is listed in a defender role. O. O'Brien has logged 0 matches and 0 minutes. Read together, the role and output numbers show whether the player is mainly providing minutes, goal threat, chance creation, or a more supporting contribution.